Here we are talking about the tool for checking the page load time. Below is the link for the tool where you need to put your domain name and then it will show you the time taken for loading that site.

@Snifan Thanks a lot for posting your query here. You can try “HTML Validator” add-on of Firefox to validate your blog as you can’t validate it directly on validator.w3c.org, Please let me know whether that worked. “HTML Validator” is developed on the base of W3C itself but developers added some extra features over there as well. Thanks for your patience.